Photini (Φωτεινή) is from the Greek phōs (light) — "luminous, enlightened." In Eastern Orthodox tradition, Photini is the name given to the unnamed Samaritan woman who spoke with Jesus at Jacob's Well in John 4 — venerated as the great evangelist of Samaria and martyred under Nero. Equal-to-the-Apostles in Orthodox tradition.
Among the most popular Greek feminine names.
Photini does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Photini reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.